The capsules make up modular racks in shops. Customers use an app to select how much of a product - such as rice or pasta - they want, and fill either their own containers or paper bags. The empty capsule is collected and washed by Miwa, then sent back to the supplier to be refilled.

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The system is currently in the prototype stage. When Sky News visited a factory in the north of the Czech Republic, it was mainly cardboard.

Nevertheless, Miwa is due to open a fully functioning concept store in Prague in March.

The company won the News Plastic Economy Innovation Prize, awarded by the Ellen MacArthur Foundation, in May 2017, and part of its ambition is to show that sustainable packaging can be better business - for Miwa too.

"It's about creating impact through the technology - and of course that's our business, we want to sell the technology," Mr Baca says, "(while) also explaining that there (are) other ways to solve the problems than just recycling."

Retailers are interested in pioneering new ways of shopping, and suppliers like the idea of saving on logistics and packaging, Mr Baca says.